Commit Graph

1073 Commits

Author SHA1 Message Date
Stefan Holderbach
c3428b891a
Bump version for 0.92.0 release (#12349)
- [x] `cargo hack` feature flag compatibility run
- [x] reedline released and pinned
- [x] `nu-plugin-test-support` added to release script
- [x] dependency tree checked
- [x] release notes
2024-04-02 20:50:26 +03:00
Stefan Holderbach
cc39069e13
Reuse existing small allocations if possible (#12335)
Those allocations are all small and insignificant in the grand scheme of
things and the optimizer may be able to resolve some of those but better
to be nice anyways.

Primarily inspired by the new
[`clippy::assigning_clones`](https://rust-lang.github.io/rust-clippy/master/index.html#/assigning_clones)

- **Avoid reallocs with `clone_from` in `nu-parser`**
- **Avoid realloc on assignment in `Stack`**
- **Fix `clippy::assigning_clones` in `nu-cli`**
- **Reuse allocations in `nu-explore` if possible**
2024-03-30 14:04:11 +01:00
Stefan Holderbach
e889679d42
Use nightly clippy to kill dead code/fix style (#12334)
- **Remove duplicated imports**
- **Remove unused field in `CompletionOptions`**
- **Remove unused struct in `nu-table`**
- **Clarify generic bounds**
- **Simplify a subtrait bound for `ExactSizeIterator`**
- **Use `unwrap_or_default`**
- **Use `Option` directly instead of empty string**
- **Elide unneeded clone in `to html`**
2024-03-30 09:17:28 +08:00
Ian Manske
c747ec75c9
Add command_prelude module (#12291)
# Description
When implementing a `Command`, one must also import all the types
present in the function signatures for `Command`. This makes it so that
we often import the same set of types in each command implementation
file. E.g., something like this:
```rust
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{
    record, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData,
    ShellError, Signature, Span, Type, Value,
};
```

This PR adds the `nu_engine::command_prelude` module which contains the
necessary and commonly used types to implement a `Command`:
```rust
// command_prelude.rs
pub use crate::CallExt;
pub use nu_protocol::{
    ast::{Call, CellPath},
    engine::{Command, EngineState, Stack},
    record, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, IntoSpanned,
    PipelineData, Record, ShellError, Signature, Span, Spanned, SyntaxShape, Type, Value,
};
```

This should reduce the boilerplate needed to implement a command and
also gives us a place to track the breadth of the `Command` API. I tried
to be conservative with what went into the prelude modules, since it
might be hard/annoying to remove items from the prelude in the future.
Let me know if something should be included or excluded.
2024-03-26 21:17:30 +00:00
Antoine Büsch
4ddc35cdad
Move more dependencies to workspace level (#12270)
# Description
This is a followup to #12043 that moves more dependency versions to
workspace dependencies.

# User-Facing Changes
N/A

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
2024-03-23 18:46:02 -05:00
Devyn Cairns
c79c43d2f8
Add test support crate for plugin developers (#12259)
# Description

Adds a `nu-plugin-test-support` crate with an interface that supports
testing plugins.

Unlike in reality, these plugins run in the same process on separate
threads. This will allow
testing aspects of the plugin internal state and handling serialized
plugin custom values easily.
We still serialize their custom values and all of the engine to plugin
logic is still in play, so
from a logical perspective this should still expose any bugs that would
have been caused by that.
The only difference is that it doesn't run in a different process, and
doesn't try to serialize
everything to the final wire format for stdin/stdout.

TODO still:

- [x] Clean up warnings about private types exposed in trait definition
- [x] Automatically deserialize plugin custom values in the result so
they can be inspected
- [x] Automatic plugin examples test function
- [x] Write a bit more documentation
- [x] More tests
- [x] Add MIT License file to new crate

# User-Facing Changes

Plugin developers get a nice way to test their plugins.

# Tests + Formatting
Run the tests with `cargo test -p nu-plugin-test-support --
--show-output` to see some examples of what the failing test output for
examples can look like. I used the `difference` crate (MIT licensed) to
make it look nice.

- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

# After Submitting

- [ ] Add a section to the book about testing
- [ ] Test some of the example plugins this way
- [ ] Add example tests to nu_plugin_template so plugin developers have
something to start with
2024-03-23 13:29:54 -05:00
YizhePKU
ef05d1419d
Fix: missing parse error when extra tokens are given to let bindings (#12238)
Manual checks are added to `parse_let`, `parse_mut`, and `parse_const`.
`parse_var_with_opt_type` is also fixed to update `spans_idx` correctly.
Fixes #12125.

It's technically a fix, but I'd rather not merge this directly. I'm
making this PR to bring into attention the code quality of the parser
code. For example:

* Inconsistent usage of `spans_idx`. What is its purpose, and which
parsing functions need it? I suspect it's possible to remove the usage
of `spans_idx` entirely.
* Lacking documentation for top-level functions. What does `mutable`
mean for `parse_var_with_opt_type()`?
* Inconsistent error reporting. Usage of both `working_set.error()` and
`working_set.parse_errors.push()`. Using `ParseError::Expected` for an
invalid variable name when there's `ParseError::VariableNotValid` (from
`parser.rs:5237`). Checking variable names manually when there's
`is_variable()` (from `parser.rs:2905`).
* `span()` is a terrible name for a function that flattens a bunch of
spans into one (from `nu-protocal/src/span.rs:92`). The top-level
comment (`Used when you have a slice of spans of at least size 1`)
doesn't help either.

I've only looked at a small portion of the parser code; I expect there
are a lot more. These issues made it much harder to fix a simple bug
like #12125. I believe we should invest some effort to cleanup the
parser code, which will ease maintainance in the future. I'll willing to
help if there is interest.
2024-03-21 10:37:52 -05:00
Devyn Cairns
cf321ab510
Make EngineState clone cheaper with Arc on all of the heavy objects (#12229)
# Description
This makes many of the larger objects in `EngineState` into `Arc`, and
uses `Arc::make_mut` to do clone-on-write if the reference is not
unique. This is generally very cheap, giving us the best of both worlds
- allowing us to mutate without cloning if we have an exclusive
reference, and cloning if we don't.

This started as more of a curiosity for me after remembering that
`Arc::make_mut` exists and can make using `Arc` for mostly immutable
data that sometimes needs to be changed very convenient, and also after
hearing someone complain about memory usage on Discord - this is a
somewhat significant win for that.

The exact objects that were wrapped in `Arc`:

- `files`, `file_contents` - the strings and byte buffers
- `decls` - the whole `Vec`, but mostly to avoid lots of individual
`malloc()` calls on Clone rather than for memory usage
- `blocks` - the blocks themselves, rather than the outer Vec
- `modules` - the modules themselves, rather than the outer Vec
- `env_vars`, `previous_env_vars` - the entire maps
- `config`

The changes required were relatively minimal, but this is a breaking API
change. In particular, blocks are added as Arcs, to allow the parser
cache functionality to work.

With my normal nu config, running on Linux, this saves me about 15 MiB
of process memory usage when running interactively (65 MiB → 50 MiB).

This also makes quick command executions cheaper, particularly since
every REPL loop now involves a clone of the engine state so that we can
recover from a panic. It also reduces memory usage where engine state
needs to be cloned and sent to another thread or kept within an
iterator.

# User-Facing Changes
Shouldn't be any, since it's all internal stuff, but it does change some
public interfaces so it's a breaking change
2024-03-19 19:07:00 +01:00
Ian Manske
b6c7656194
IO and redirection overhaul (#11934)
# Description
The PR overhauls how IO redirection is handled, allowing more explicit
and fine-grain control over `stdout` and `stderr` output as well as more
efficient IO and piping.

To summarize the changes in this PR:
- Added a new `IoStream` type to indicate the intended destination for a
pipeline element's `stdout` and `stderr`.
- The `stdout` and `stderr` `IoStream`s are stored in the `Stack` and to
avoid adding 6 additional arguments to every eval function and
`Command::run`. The `stdout` and `stderr` streams can be temporarily
overwritten through functions on `Stack` and these functions will return
a guard that restores the original `stdout` and `stderr` when dropped.
- In the AST, redirections are now directly part of a `PipelineElement`
as a `Option<Redirection>` field instead of having multiple different
`PipelineElement` enum variants for each kind of redirection. This
required changes to the parser, mainly in `lite_parser.rs`.
- `Command`s can also set a `IoStream` override/redirection which will
apply to the previous command in the pipeline. This is used, for
example, in `ignore` to allow the previous external command to have its
stdout redirected to `Stdio::null()` at spawn time. In contrast, the
current implementation has to create an os pipe and manually consume the
output on nushell's side. File and pipe redirections (`o>`, `e>`, `e>|`,
etc.) have precedence over overrides from commands.

This PR improves piping and IO speed, partially addressing #10763. Using
the `throughput` command from that issue, this PR gives the following
speedup on my setup for the commands below:
| Command | Before (MB/s) | After (MB/s) | Bash (MB/s) |
| --------------------------- | -------------:| ------------:|
-----------:|
| `throughput o> /dev/null` | 1169 | 52938 | 54305 |
| `throughput \| ignore` | 840 | 55438 | N/A |
| `throughput \| null` | Error | 53617 | N/A |
| `throughput \| rg 'x'` | 1165 | 3049 | 3736 |
| `(throughput) \| rg 'x'` | 810 | 3085 | 3815 |

(Numbers above are the median samples for throughput)

This PR also paves the way to refactor our `ExternalStream` handling in
the various commands. For example, this PR already fixes the following
code:
```nushell
^sh -c 'echo -n "hello "; sleep 0; echo "world"' | find "hello world"
```
This returns an empty list on 0.90.1 and returns a highlighted "hello
world" on this PR.

Since the `stdout` and `stderr` `IoStream`s are available to commands
when they are run, then this unlocks the potential for more convenient
behavior. E.g., the `find` command can disable its ansi highlighting if
it detects that the output `IoStream` is not the terminal. Knowing the
output streams will also allow background job output to be redirected
more easily and efficiently.

# User-Facing Changes
- External commands returned from closures will be collected (in most
cases):
  ```nushell
  1..2 | each {|_| nu -c "print a" }
  ```
This gives `["a", "a"]` on this PR, whereas this used to print "a\na\n"
and then return an empty list.

  ```nushell
  1..2 | each {|_| nu -c "print -e a" }
  ```
This gives `["", ""]` and prints "a\na\n" to stderr, whereas this used
to return an empty list and print "a\na\n" to stderr.

- Trailing new lines are always trimmed for external commands when
piping into internal commands or collecting it as a value. (Failure to
decode the output as utf-8 will keep the trailing newline for the last
binary value.) In the current nushell version, the following three code
snippets differ only in parenthesis placement, but they all also have
different outputs:

  1. `1..2 | each { ^echo a }`
     ```
     a
     a
     ╭────────────╮
     │ empty list │
     ╰────────────╯
     ```
  2. `1..2 | each { (^echo a) }`
     ```
     ╭───┬───╮
     │ 0 │ a │
     │ 1 │ a │
     ╰───┴───╯
     ```
  3. `1..2 | (each { ^echo a })`
     ```
     ╭───┬───╮
     │ 0 │ a │
     │   │   │
     │ 1 │ a │
     │   │   │
     ╰───┴───╯
     ```

  But in this PR, the above snippets will all have the same output:
  ```
  ╭───┬───╮
  │ 0 │ a │
  │ 1 │ a │
  ╰───┴───╯
  ```

- All existing flags on `run-external` are now deprecated.

- File redirections now apply to all commands inside a code block:
  ```nushell
  (nu -c "print -e a"; nu -c "print -e b") e> test.out
  ```
This gives "a\nb\n" in `test.out` and prints nothing. The same result
would happen when printing to stdout and using a `o>` file redirection.

- External command output will (almost) never be ignored, and ignoring
output must be explicit now:
  ```nushell
  (^echo a; ^echo b)
  ```
This prints "a\nb\n", whereas this used to print only "b\n". This only
applies to external commands; values and internal commands not in return
position will not print anything (e.g., `(echo a; echo b)` still only
prints "b").

- `complete` now always captures stderr (`do` is not necessary).

# After Submitting
The language guide and other documentation will need to be updated.
2024-03-14 15:51:55 -05:00
Ian Manske
26786a759e
Fix ignored clippy lints (#12160)
# Description
Fixes some ignored clippy lints.

# User-Facing Changes
Changes some signatures and return types to `&dyn Command` instead of
`&Box<dyn Command`, but I believe this is only an internal change.
2024-03-11 19:46:04 +01:00
Stefan Holderbach
f695ba408a
Restructure nu-protocol in more meaningful units (#11917)
This is partially "feng-shui programming" of moving things to new
separate places.

The later commits include "`git blame` tollbooths" by moving out chunks
of code into new files, which requires an extra step to track things
with `git blame`. We can negiotiate if you want to keep particular
things in their original place.

If egregious I tried to add a bit of documentation. If I see something
that is unused/unnecessarily `pub` I will try to remove that.


- Move `nu_protocol::Exportable` to `nu-parser`
- Guess doccomment for `Exportable`
- Move `Unit` enum from `value` to `AST`
- Move engine state `Variable` def into its folder
- Move error-related files in `nu-protocol` subdir
- Move `pipeline_data` module into its own folder
- Move `stream.rs` over into the `pipeline_data` mod
- Move `PipelineMetadata` into its own file
- Doccomment `PipelineMetadata`
- Remove unused `is_leap_year` in `value/mod`
- Note about criminal `type_compatible` helper
- Move duration fmting into new `value/duration.rs`
- Move filesize fmting logic to new `value/filesize`
- Split reexports from standard imports in `value/mod`
- Doccomment trait `CustomValue`
- Polish doccomments and intradoc links
2024-03-10 18:45:45 +01:00
Devyn Cairns
1d14d29408
Fix unused IntoSpanned warning in nu_parser::parse_keywords when 'plugin' feature not enabled (#12144)
# Description

There is a warning about unused `IntoSpanned` currently when running
`cargo check -p nu-parser`, introduced accidentally by #12064. This
fixes that.

# User-Facing Changes
None

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
2024-03-10 07:55:46 +08:00
Devyn Cairns
bc19be25b1
Keep plugins persistently running in the background (#12064)
# Description
This PR uses the new plugin protocol to intelligently keep plugin
processes running in the background for further plugin calls.

Running plugins can be seen by running the new `plugin list` command,
and stopped by running the new `plugin stop` command.

This is an enhancement for the performance of plugins, as starting new
plugin processes has overhead, especially for plugins in languages that
take a significant amount of time on startup. It also enables plugins
that have persistent state between commands, making the migration of
features like dataframes and `stor` to plugins possible.

Plugins are automatically stopped by the new plugin garbage collector,
configurable with `$env.config.plugin_gc`:

```nushell
  $env.config.plugin_gc = {
      # Configuration for plugin garbage collection
      default: {
          enabled: true # true to enable stopping of inactive plugins
          stop_after: 10sec # how long to wait after a plugin is inactive to stop it
      }
      plugins: {
          # alternate configuration for specific plugins, by name, for example:
          #
          # gstat: {
          #     enabled: false
          # }
      }
  }
```

If garbage collection is enabled, plugins will be stopped after
`stop_after` passes after they were last active. Plugins are counted as
inactive if they have no running plugin calls. Reading the stream from
the response of a plugin call is still considered to be activity, but if
a plugin holds on to a stream but the call ends without an active
streaming response, it is not counted as active even if it is reading
it. Plugins can explicitly disable the GC as appropriate with
`engine.set_gc_disabled(true)`.

The `version` command now lists plugin names rather than plugin
commands. The list of plugin commands is accessible via `plugin list`.

Recommend doing this together with #12029, because it will likely force
plugin developers to do the right thing with mutability and lead to less
unexpected behavior when running plugins nested / in parallel.

# User-Facing Changes
- new command: `plugin list`
- new command: `plugin stop`
- changed command: `version` (now lists plugin names, rather than
commands)
- new config: `$env.config.plugin_gc`
- Plugins will keep running and be reused, at least for the configured
GC period
- Plugins that used mutable state in weird ways like `inc` did might
misbehave until fixed
- Plugins can disable GC if they need to
- Had to change plugin signature to accept `&EngineInterface` so that
the GC disable feature works. #12029 does this anyway, and I'm expecting
(resolvable) conflicts with that

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

Because there is some specific OS behavior required for plugins to not
respond to Ctrl-C directly, I've developed against and tested on both
Linux and Windows to ensure that works properly.

# After Submitting
I think this probably needs to be in the book somewhere
2024-03-09 17:10:22 -06:00
Antoine Büsch
979a97c455
Introduce workspace dependencies (#12043)
# Description
This PR introduces [workspaces
dependencies](https://doc.rust-lang.org/cargo/reference/workspaces.html#the-dependencies-table).
The advantages are:
- a single place where dependency versions are declared
- reduces the number of files to change when upgrading a dependency
- reduces the risk of accidentally depending on 2 different versions of
the same dependency

I've only done a few so far. If this PR is accepted, I might continue
and progressively do the rest.

# User-Facing Changes
N/A

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

# After Submitting
N/A
2024-03-07 14:40:31 -08:00
dj-sourbrough
48fca1c151
Fix: lex now throws error on unbalanced closing parentheses (issue #11982) (#12098)
- Fixes issue #11982 

# Description
Expressions with unbalanced parenthesis [excess closing ')' parenthesis]
will throw an error instead of interpreting ')' as a string.

Solved he same way as closing braces '}' are handled.

![Screenshot 2024-03-06 at 14 53
46](https://github.com/nushell/nushell/assets/56027726/86834e47-a1e5-484d-881d-0e3b80fecef8)

![Screenshot 2024-03-06 at 14 48
27](https://github.com/nushell/nushell/assets/56027726/bb27c969-6a3b-4735-8a1e-a5881d9096d3)

# User-Facing Changes
- Trailing closing parentheses ')' which do not match the number of
opening parentheses '(' will lead to a parse error.
- From what I have found in the documentation this is the intended
behavior, thus no documentation has been updated on my part

# Tests + Formatting
- Two tests added in src/tests/test_parser.rs
- All previous tests are still passing
- cargo fmt, clippy and test have been run

Unable to get the following command run
- `cargo run -- -c "use std testing; testing run-tests --path
crates/nu-std"` to run the tests for the standard library
![Screenshot 2024-03-06 at 20 06
25](https://github.com/nushell/nushell/assets/56027726/91724fb9-d7d0-472b-bf14-bfa2a7618d09)

---------

Co-authored-by: Noak Jönsson <noakj@kth.se>
2024-03-07 06:05:04 -06:00
Stefan Holderbach
e5f086cfb4
Bump version to 0.91.1 (#12085) 2024-03-06 23:08:14 +01:00
Stefan Holderbach
3016d7a64c
Bump version for 0.91.0 release (#12070) 2024-03-05 21:28:40 +01:00
geekvest
3ee2fc60f9
Fix typos in comments (#12052)
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# Description
<!--
Thank you for improving Nushell. Please, check our [contributing
guide](../CONTRIBUTING.md) and talk to the core team before making major
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Description of your pull request goes here. **Provide examples and/or
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Fix typos in comments

# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->

# Tests + Formatting
<!--
Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

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crates/nu-std"` to run the tests for the standard library

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> from `nushell` you can also use the `toolkit` as follows
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> toolkit check pr
> ```
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# After Submitting
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Signed-off-by: geekvest <cuimoman@sohu.com>
2024-03-03 06:28:56 -06:00
Wind
387328fe73
Glob: don't allow implicit casting between glob and string (#11992)
# Description
As title, currently on latest main, nushell confused user if it allows
implicit casting between glob and string:
```nushell
let x = "*.txt"
def glob-test [g: glob] { open $g } 
glob-test $x
```
It always expand the glob although `$x` is defined as a string.
This pr implements a solution from @kubouch :
> We could make it really strict and disallow all autocasting between
globs and strings because that's what's causing the "magic" confusion.
Then, modify all builtins that accept globs to accept oneof(glob,
string) and the rules would be that globs always expand and strings
never expand

# User-Facing Changes
After this pr, user needs to use `into glob` to invoke `glob-test`, if
user pass a string variable:
```nushell
let x = "*.txt"
def glob-test [g: glob] { open $g } 
glob-test ($x | into glob)
```
Or else nushell will return an error.
```
 3 │ glob-test $x
   ·           ─┬
   ·            ╰── can't convert string to glob
```

# Tests + Formatting
Done

# After Submitting
Nan
2024-02-28 23:05:35 +08:00
Wind
f7d647ac3c
open, rm, umv, cp, rm and du: Don't globs if inputs are variables or string interpolation (#11886)
# Description
This is a follow up to
https://github.com/nushell/nushell/pull/11621#issuecomment-1937484322

Also Fixes: #11838 

## About the code change
It applys the same logic when we pass variables to external commands:


0487e9ffcb/crates/nu-command/src/system/run_external.rs (L162-L170)

That is: if user input dynamic things(like variables, sub-expression, or
string interpolation), it returns a quoted `NuPath`, then user input
won't be globbed
 
# User-Facing Changes
Given two input files: `a*c.txt`, `abc.txt`

* `let f = "a*c.txt"; rm $f` will remove one file: `a*c.txt`. 
~* `let f = "a*c.txt"; rm --glob $f` will remove `a*c.txt` and
`abc.txt`~
* `let f: glob = "a*c.txt"; rm $f` will remove `a*c.txt` and `abc.txt`

## Rules about globbing with *variable*
Given two files: `a*c.txt`, `abc.txt`
| Cmd Type | example | Result |
| ----- | ------------------ | ------ |
| builtin | let f = "a*c.txt"; rm $f | remove `a*c.txt` |
| builtin | let f: glob = "a*c.txt"; rm $f | remove `a*c.txt` and
`abc.txt`
| builtin | let f = "a*c.txt"; rm ($f \| into glob) | remove `a*c.txt`
and `abc.txt`
| custom | def crm [f: glob] { rm $f }; let f = "a*c.txt"; crm $f |
remove `a*c.txt` and `abc.txt`
| custom | def crm [f: glob] { rm ($f \| into string) }; let f =
"a*c.txt"; crm $f | remove `a*c.txt`
| custom | def crm [f: string] { rm $f }; let f = "a*c.txt"; crm $f |
remove `a*c.txt`
| custom | def crm [f: string] { rm $f }; let f = "a*c.txt"; crm ($f \|
into glob) | remove `a*c.txt` and `abc.txt`

In general, if a variable is annotated with `glob` type, nushell will
expand glob pattern. Or else, we need to use `into | glob` to expand
glob pattern

# Tests + Formatting
Done

# After Submitting
I think `str glob-escape` command will be no-longer required. We can
remove it.
2024-02-23 09:17:09 +08:00
Stefan Holderbach
6e590fe0a2
Remove unused Index(Mut) impls on AST types (#11903)
# Description
Both `Block` and `Pipeline` had `Index`/`IndexMut` implementations to
access their elements, that are currently unused.
Explicit helpers or iteration would generally be preferred anyways but
in the current state the inner containers are `pub` and are liberally
used. (Sometimes with potentially panicking indexing or also iteration)

As it is potentially unclear what the meaning of the element from a
block or pipeline queried by a usize is, let's remove it entirely until
we come up with a better API.

# User-Facing Changes
None

Plugin authors shouldn't dig into AST internals
2024-02-21 18:02:30 +08:00
Ian Manske
1c49ca503a
Name the Value conversion functions more clearly (#11851)
# Description
This PR renames the conversion functions on `Value` to be more consistent.
It follows the Rust [API guidelines](https://rust-lang.github.io/api-guidelines/naming.html#ad-hoc-conversions-follow-as_-to_-into_-conventions-c-conv) for ad-hoc conversions.
The conversion functions on `Value` now come in a few forms:
- `coerce_{type}` takes a `&Value` and attempts to convert the value to
`type` (e.g., `i64` are converted to `f64`). This is the old behavior of
some of the `as_{type}` functions -- these functions have simply been
renamed to better reflect what they do.
- The new `as_{type}` functions take a `&Value` and returns an `Ok`
result only if the value is of `type` (no conversion is attempted). The
returned value will be borrowed if `type` is non-`Copy`, otherwise an
owned value is returned.
- `into_{type}` exists for non-`Copy` types, but otherwise does not
attempt conversion just like `as_type`. It takes an owned `Value` and
always returns an owned result.
- `coerce_into_{type}` has the same relationship with `coerce_{type}` as
`into_{type}` does with `as_{type}`.
- `to_{kind}_string`: conversion to different string formats (debug,
abbreviated, etc.). Only two of the old string conversion functions were
removed, the rest have been renamed only.
- `to_{type}`: other conversion functions. Currently, only `to_path`
exists. (And `to_string` through `Display`.)

This table summaries the above:
| Form | Cost | Input Ownership | Output Ownership | Converts `Value`
case/`type` |
| ---------------------------- | ----- | --------------- |
---------------- | -------- |
| `as_{type}` | Cheap | Borrowed | Borrowed/Owned | No |
| `into_{type}` | Cheap | Owned | Owned | No |
| `coerce_{type}` | Cheap | Borrowed | Borrowed/Owned | Yes |
| `coerce_into_{type}` | Cheap | Owned | Owned | Yes |
| `to_{kind}_string` | Expensive | Borrowed | Owned | Yes |
| `to_{type}` | Expensive | Borrowed | Owned | Yes |

# User-Facing Changes
Breaking API change for `Value` in `nu-protocol` which is exposed as
part of the plugin API.
2024-02-17 18:14:16 +00:00
Wind
58c6fea60b
Support redirect stderr and stdout+stderr with a pipe (#11708)
# Description
Close: #9673
Close: #8277
Close: #10944

This pr introduces the following syntax:
1. `e>|`, pipe stderr to next command. Example: `$env.FOO=bar nu
--testbin echo_env_stderr FOO e>| str length`
2. `o+e>|` and `e+o>|`, pipe both stdout and stderr to next command,
example: `$env.FOO=bar nu --testbin echo_env_mixed out-err FOO FOO e+o>|
str length`

Note: it only works for external commands. ~There is no different for
internal commands, that is, the following three commands do the same
things:~ Edit: it raises errors if we want to pipes for internal
commands
``` 
❯ ls e>| str length
Error:   × `e>|` only works with external streams
   ╭─[entry #1:1:1]
 1 │ ls e>| str length
   ·    ─┬─
   ·     ╰── `e>|` only works on external streams
   ╰────

❯ ls e+o>| str length
Error:   × `o+e>|` only works with external streams
   ╭─[entry #2:1:1]
 1 │ ls e+o>| str length
   ·    ──┬──
   ·      ╰── `o+e>|` only works on external streams
   ╰────
```

This can help us to avoid some strange issues like the following:

`$env.FOO=bar (nu --testbin echo_env_stderr FOO) e>| str length`

Which is hard to understand and hard to explain to users.

# User-Facing Changes
Nan

# Tests + Formatting
To be done

# After Submitting
Maybe update documentation about these syntax.
2024-02-09 01:30:46 +08:00
KITAGAWA Yasutaka
09f513bb53
Allow comments in match blocks (#11717)
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Fix #9878 

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helps us keep track of breaking changes. -->
Writing comments in match blocks will be allowed.

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2024-02-08 07:22:42 +08:00
TrMen
4b91ed57dd
Enforce call stack depth limit for all calls (#11729)
# Description
Previously, only direcly-recursive calls were checked for recursion
depth. But most recursive calls in nushell are mutually recursive since
expressions like `for`, `where`, `try` and `do` all execute a separte
block.

```nushell
def f [] {
    do { f }
}
```
Calling `f` would crash nushell with a stack overflow.

I think the only general way to prevent such a stack overflow is to
enforce a maximum call stack depth instead of only disallowing directly
recursive calls.

This commit also moves that logic into `eval_call()` instead of
`eval_block()` because the recursion limit is tracked in the `Stack`,
but not all blocks are evaluated in a new stack. Incrementing the
recursion depth of the caller's stack would permanently increment that
for all future calls.

Fixes #11667

# User-Facing Changes
Any function call can now fail with `recursion_limit_reached` instead of
just directly recursive calls. Mutually-recursive calls no longer crash
nushell.

# After Submitting
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2024-02-08 06:42:24 +08:00
Darren Schroeder
08931e976e
bump to dev release of nushell 0.90.2 (#11793)
# Description

Bump nushell version to the dev version of 0.90.2

# User-Facing Changes
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2024-02-07 16:26:03 -06:00
Jakub Žádník
c2992d5d8b
Bump to 0.90.1 (#11787)
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Merge after https://github.com/nushell/nushell/pull/11786

# Description
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2024-02-06 16:28:49 -06:00
Jakub Žádník
f5f21aca2d
Bump to 0.90 (#11730)
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2024-02-06 22:42:43 +02:00
Jakub Žádník
c7a8aac883
Tighten def body parsing (#11719)
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Fixes https://github.com/nushell/nushell/issues/11711

Previously, syntax `def a [] (echo 4)` was allowed to parse and then
failed with panic duting eval.

Current error:
```
Error: nu::parser::parse_mismatch

  × Parse mismatch during operation.
   ╭─[entry #1:1:1]
 1 │ def a [] (echo 4)
   ·          ────┬───
   ·              ╰── expected definition body closure { ... }
   ╰────
```

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2024-02-03 13:20:40 +02:00
Yash Thakur
c08f46f836
Respect SyntaxShape when parsing spread operator (#11674)
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This fixes an issue brought up by nihilander in
[Discord](https://discord.com/channels/601130461678272522/614593951969574961/1201594105986285649).

# Description
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Nushell panics when the spread operator is used like this (the
`...$rest` shouldn't actually be parsed as a spread operator at all):

```nu
$ def foo [...rest: string] {...$rest}                      
$ foo bar baz                                               
thread 'main' panicked at /root/.cargo/registry/src/index.crates.io-6f17d22bba15001f/nu-protocol-0.89.0/src/signature.rs:650:9:
Internal error: can't run a predeclaration without a body
stack backtrace:
   0: rust_begin_unwind
   1: core::panicking::panic_fmt
   2: <nu_protocol::signature::Predeclaration as nu_protocol::engine::command::Command>::run
   3: nu_engine::eval::eval_call
   4: nu_engine::eval::eval_expression_with_input
   5: nu_engine::eval::eval_element_with_input
   6: nu_engine::eval::eval_block
   7: nu_cli::util::eval_source
   8: nu_cli::repl::evaluate_repl
   9: nu::run::run_repl
  10: nu::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
```

The problem was that whenever the parser saw something like `{...$`,
`{...(`, or `{...[`, it would treat that as a record with a spread
expression, ignoring the syntax shape of the block it was parsing. This
should now be fixed, and the snippet above instead gives the following
error:

```nu
Error: nu:🐚:external_command

  × External command failed
   ╭─[entry #1:1:1]
 1 │  def foo [...rest] {...$rest}
   ·                     ────┬───
   ·                         ╰── executable was not found
   ╰────
  help: No such file or directory (os error 2)
```

# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
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Stuff like `do { ...$rest }` will now try to run a command `...$rest`
rather than complaining that variable `$rest` doesn't exist.

# Tests + Formatting
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Sorry about the issue, I am not touching the parser again for a long
time :)
2024-01-30 13:49:42 +08:00
Sophia June Turner
798ae7b251
Fix precedence of 'not' operator (#11672)
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# Description

A bit hackish but this fixes the precedence of the `not` operator.

Before: `not false and false` => true

Now: `not false and false` => false

Fixes #11633

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---------

Co-authored-by: Jakub Žádník <kubouch@gmail.com>
2024-01-29 21:42:27 +02:00
WindSoilder
d646903161
Unify glob behavior on open, rm, cp-old, mv, umv, cp and du commands (#11621)
# Description
This pr is a follow up to
[#11569](https://github.com/nushell/nushell/pull/11569#issuecomment-1902279587)
> Revert the logic in https://github.com/nushell/nushell/pull/10694 and
apply the logic in this pr to mv, cp, rv will require a larger change, I
need to think how to achieve the bahavior

And sorry @bobhy for reverting some of your changes.

This pr is going to unify glob behavior on the given commands:
* open
* rm
* cp-old
* mv
* umv
* cp
* du

So they have the same behavior to `ls`, which is:
If given parameter is quoted by single quote(`'`) or double quote(`"`),
don't auto-expand the glob pattern. If not quoted, auto-expand the glob
pattern.

Fixes: #9558  Fixes: #10211 Fixes: #9310 Fixes: #10364 

# TODO
But there is one thing remains: if we give a variable to the command, it
will always auto-expand the glob pattern, e.g:
```nushell
let path = "a[123]b"
rm $path
```
I don't think it's expected. But I also think user might want to
auto-expand the glob pattern in variables.

So I'll introduce a new command called `glob escape`, then if user
doesn't want to auto-expand the glob pattern, he can just do this: `rm
($path | glob escape)`

# User-Facing Changes
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helps us keep track of breaking changes. -->

# Tests + Formatting
Done

# After Submitting
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## NOTE
This pr changes the semantic of `GlobPattern`, before this pr, it will
`expand path` after evaluated, this makes `nu_engine::glob_from` have no
chance to glob things right if a path contains glob pattern.

e.g: [#9310
](https://github.com/nushell/nushell/issues/9310#issuecomment-1886824030)
#10211

I think changing the semantic is fine, because it makes glob works if
path contains something like '*'.

It maybe a breaking change if a custom command's argument are annotated
by `: glob`.
2024-01-26 21:57:35 +08:00
WindSoilder
a4809d2f08
Remove --flag: bool support (#11541)
# Description
This is a follow up to: #11365

After this pr, `--flag: bool` is no longer allowed.

I think `ParseWarning::Deprecated` is useful when we want to deprecated
something at syntax level, so I just leave it there for now.

# User-Facing Changes
## Before
```
❯ def foo [--b: bool] {}
Error:   × Deprecated: --flag: bool
   ╭─[entry #15:1:1]
 1 │ def foo [--b: bool] {}
   ·               ──┬─
   ·                 ╰── `--flag: bool` is deprecated and will be removed in 0.90. Please use `--flag` instead, more info: https://www.nushell.sh/book/custom_commands.html
   ╰────
```

## After
```
❯ def foo [--b: bool] {}
Error:   × Type annotations are not allowed for boolean switches.
   ╭─[entry #2:1:1]
 1 │ def foo [--b: bool] {}
   ·               ──┬─
   ·                 ╰── Remove the `: bool` type annotation.
   ╰────
```
# Tests + Formatting
Done
2024-01-25 14:16:49 +08:00
Yash Thakur
90d65bb987
Evaluate string interpolation at parse time (#11562)
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Closes #11561

# Description
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This PR will allow string interpolation at parse time.

Since the actual config hasn't been loaded at parse time, this uses the
`get_config()` method on `StateWorkingSet`. So file sizes and datetimes
(I think those are the only things whose string representations depend
on the config) may be formatted differently from how users have
configured things, which may come as a surprise to some. It does seem
unlikely that anyone would be formatting file sizes or date times at
parse time. Still, something to think about if/before this PR merged.

Also, I changed the `ModuleNotFound` error to include the name of the
module.

# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->

Users will be able to do stuff like:

```nu
const x = [1 2 3]
const y = $"foo($x)" // foo[1, 2, 3]
```

The main use case is `use`-ing and `source`-ing files at parse time:

```nu
const file = "foo.nu"
use $"($file)"
```

If the module isn't found, you'll see an error like this:
```
Error: nu::parser::module_not_found

  × Module not found.
   ╭─[entry #3:1:1]
 1 │  use $"($file)"
   ·      ─────┬────
   ·           ╰── module foo.nu not found
   ╰────
  help: module files and their paths must be available before your script is run as parsing occurs before anything is evaluated
```

# Tests + Formatting
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# After Submitting
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Although there's user-facing changes, there's probably no need to change
the docs since people probably already expect string interpolation to
work at parse time.

Edit: @kubouch pointed out that we'd need to document the fact that
stuff like file sizes and datetimes won't get formatted according to
user's runtime configs, so I'll make a PR to nushell.github.io after
this one
2024-01-22 09:13:48 +02:00
WindSoilder
c59d6d31bc
do not attempt to glob expand if the file path is wrapped in quotes (#11569)
# Description
Fixes: #11455

### For arguments which is annotated with `:path/:directory/:glob`
To fix the issue, we need to have a way to know if a path is originally
quoted during runtime. So the information needed to be added at several
levels:
* parse time (from user input to expression)
We need to add quoted information into `Expr::Filepath`,
`Expr::Directory`, `Expr::GlobPattern`
* eval time
When convert from `Expr::Filepath`, `Expr::Directory`,
`Expr::GlobPattern` to `Value::String` during runtime, we won't auto
expanded the path if it's quoted

### For `ls`
It's really special, because it accepts a `String` as a pattern, and it
generates `glob` expression inside the command itself.

So the idea behind the change is introducing a special SyntaxShape to
ls: `SyntaxShape::LsGlobPattern`. So we can track if the pattern is
originally quoted easier, and we don't auto expand the path either.

Then when constructing a glob pattern inside ls, we check if input
pattern is quoted, if so: we escape the input pattern, so we can run `ls
a[123]b`, because it's already escaped.
Finally, to accomplish the checking process, we also need to introduce a
new value type called `Value::QuotedString` to differ from
`Value::String`, it's used to generate an enum called `NuPath`, which is
finally used in `ls` function. `ls` learned from `NuPath` to know if
user input is quoted.

# User-Facing Changes
Actually it contains several changes
### For arguments which is annotated with `:path/:directory/:glob`
#### Before
```nushell
> def foo [p: path] { echo $p }; print (foo "~/a"); print (foo '~/a')
/home/windsoilder/a
/home/windsoilder/a
> def foo [p: directory] { echo $p }; print (foo "~/a"); print (foo '~/a')
/home/windsoilder/a
/home/windsoilder/a
> def foo [p: glob] { echo $p }; print (foo "~/a"); print (foo '~/a')
/home/windsoilder/a
/home/windsoilder/a
```
#### After
```nushell
> def foo [p: path] { echo $p }; print (foo "~/a"); print (foo '~/a')
~/a
~/a
> def foo [p: directory] { echo $p }; print (foo "~/a"); print (foo '~/a')
~/a
~/a
> def foo [p: glob] { echo $p }; print (foo "~/a"); print (foo '~/a')
~/a
~/a
```
### For ls command
`touch '[uwu]'`
#### Before
```
❯ ls -D "[uwu]"
Error:   × No matches found for [uwu]
   ╭─[entry #6:1:1]
 1 │ ls -D "[uwu]"
   ·       ───┬───
   ·          ╰── Pattern, file or folder not found
   ╰────
  help: no matches found
```

#### After
```
❯ ls -D "[uwu]"
╭───┬───────┬──────┬──────┬──────────╮
│ # │ name  │ type │ size │ modified │
├───┼───────┼──────┼──────┼──────────┤
│ 0 │ [uwu] │ file │  0 B │ now      │
╰───┴───────┴──────┴──────┴──────────╯
```

# Tests + Formatting
Done

# After Submitting
NaN
2024-01-21 23:22:25 +08:00
tomoda
6edf91dcae
Allow string to copmpare with another string (#11590)
# Description

Nushell parser now reject comparison operator with 2 strings (e.g.
`"abc" < "cba"`). This pr fixes it.

## before

```nu
~
❯ "abc" < "bca"
Error: nu::parser::unsupported_operation

  × less-than comparison is not supported on values of type string
   ╭─[entry #43:1:1]
 1 │ "abc" < "bca"
   · ──┬── ┬
   ·   │   ╰── doesn't support this value
   ·   ╰── string
   ╰────


~
❯ def foo []: nothing -> string { "abc" }

~
❯ (foo) < "bca"
Error: nu::parser::unsupported_operation

  × less-than comparison is not supported on values of type string
   ╭─[entry #53:1:1]
 1 │ (foo) < "bca"
   · ──┬── ┬
   ·   │   ╰── doesn't support this value
   ·   ╰── string
   ╰────
```

## after

```nu
~
❯ "abc" < "bca"
true

~
❯ def foo []: nothing -> string { "abc" }

~
❯ (foo) < "bca"
true
```

# User-Facing Changes

Following pattern will be allowed.

| operator | type of lhs | type of rhs | result |
| -------- | ----------- | ----------- | ------ |
| `<`      | string      | string      | bool   |
| `<=`     | string      | string      | bool   |
| `>`      | string      | string      | bool   |
| `>=`     | string      | string      | bool   |

# Tests + Formatting

- [x] `cargo fmt --all -- --check` to check standard code formatting
(`cargo fmt --all` applies these changes)
- [x] `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used`
to check that you're using the standard code style
- [x] `cargo test --workspace` to check that all tests pass (on Windows
make sure to [enable developer
mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging))
- [x] `cargo run -- -c "use std testing; testing run-tests --path
crates/nu-std"` to run the tests for the standard library

# After Submitting
2024-01-21 07:43:40 -06:00
Darren Schroeder
f12f590d82
update deps calamine and quick-xml (#11582)
# Description

This PR updates a few outdated dependencies.

# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->

# Tests + Formatting
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2024-01-19 12:23:51 -06:00
Marika Chlebowska
c8f30fa3bf
Fix parsing of strings with special characters (#11030)
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# Description
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If there were brackets in a string argument of a script it was always
interpreted as interpolation before the change. That lead to unexpected
outputs of such scripts. After this change arguments which are not
intended as interpolation (not starting with $) and containing brackets
will have implicitly added backticks for correct interpretation in the
scripts. This fixes #10908.

To fix other issues mentioned in #11035 I changed the deparsing logic.
Initially we added backticks for multi word variables and double quote
if there was \ or " in the string. My change would add double quotes any
time string starts with $ or contains any of character that might break
parsing. The characters I identified are white space, (, ', `, ",and \.
It's possible other characters should be added to this list.

I tested this solution with few simple scripts using both stand alone
arguments and flags and it seems to work but I would appreciate if
someone with more experience checked it with some more unusual cases I
missed.

# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
Erroneous behaviour described  in the issue will no longer happen.

# Tests + Formatting
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mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging))
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crates/nu-std"` to run the tests for the standard library

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> ```
-->
Added tests for new formatting.

# After Submitting
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2024-01-19 10:20:14 -06:00
Artemiy
1867bb1a88
Fix incorrect handling of boolean flags for builtin commands (#11492)
# Description
Possible fix of #11456
This PR fixes a bug where builtin commands did not respect the logic of
dynamically passed boolean flags. The reason is
[has_flag](6f59abaf43/crates/nu-protocol/src/ast/call.rs (L204C5-L212C6))
method did not evaluate and take into consideration expression used with
flag.

To address this issue a solution is proposed:
1. `has_flag` method is moved to `CallExt` and new logic to evaluate
expression and check if it is a boolean value is added
2. `has_flag_const` method is added to `CallExt` which is a constant
version of `has_flag`
3. `has_named` method is added to `Call` which is basically the old
logic of `has_flag`
4. All usages of `has_flag` in code are updated, mostly to pass
`engine_state` and `stack` to new `has_flag`. In `run_const` commands it
is replaced with `has_flag_const`. And in a few select places: parser,
`to nuon` and `into string` old logic via `has_named` is used.

# User-Facing Changes
Explicit values of boolean flags are now respected in builtin commands.
Before:

![image](https://github.com/nushell/nushell/assets/17511668/f9fbabb2-3cfd-43f9-ba9e-ece76d80043c)
After:

![image](https://github.com/nushell/nushell/assets/17511668/21867596-2075-437f-9c85-45563ac70083)

Another example:
Before:

![image](https://github.com/nushell/nushell/assets/17511668/efdbc5ca-5227-45a4-ac5b-532cdc2bbf5f)
After:

![image](https://github.com/nushell/nushell/assets/17511668/2907d5c5-aa93-404d-af1c-21cdc3d44646)


# Tests + Formatting
Added test reproducing some variants of original issue.
2024-01-11 17:19:48 +02:00
Jakub Žádník
7bb9ee55c4
Bump to dev version 0.89.1 (#11513)
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# Tests + Formatting
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2024-01-11 00:19:21 +13:00
Jakub Žádník
2c1560e281
Bump version for 0.89.0 release (#11511)
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- [x] reedline
  - [x] released
  - [x] pinned
- [ ] git dependency check
- [ ] release notes


# Description
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# User-Facing Changes
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# Tests + Formatting
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2024-01-09 22:16:29 +02:00
Yash Thakur
21b3eeed99
Allow spreading arguments to commands (#11289)
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Finishes implementing https://github.com/nushell/nushell/issues/10598,
which asks for a spread operator in lists, in records, and when calling
commands.

# Description
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This PR will allow spreading arguments to commands (both internal and
external). It will also deprecate spreading arguments automatically when
passing to external commands.

# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->

- Users will be able to use `...` to spread arguments to custom/builtin
commands that have rest parameters or allow unknown arguments, or to any
external command
- If a custom command doesn't have a rest parameter and it doesn't allow
unknown arguments either, the spread operator will not be allowed
- Passing lists to external commands without `...` will work for now but
will cause a deprecation warning saying that it'll stop working in 0.91
(is 2 versions enough time?)

Here's a function to help with demonstrating some behavior:
```nushell
> def foo [ a, b, c?, d?, ...rest ] { [$a $b $c $d $rest] | to nuon }
```

You can pass a list of arguments to fill in the `rest` parameter using
`...`:
```nushell
> foo 1 2 3 4 ...[5 6]
[1, 2, 3, 4, [5, 6]]
```

If you don't use `...`, the list `[5 6]` will be treated as a single
argument:

```nushell
> foo 1 2 3 4 [5 6] # Note the double [[]]
[1, 2, 3, 4, [[5, 6]]]
```

You can omit optional parameters before the spread arguments:
```nushell
> foo 1 2 3 ...[4 5] # d is omitted here
[1, 2, 3, null, [4, 5]]
```

If you have multiple lists, you can spread them all:
```nushell
> foo 1 2 3 ...[4 5] 6 7 ...[8] ...[]
[1, 2, 3, null, [4, 5, 6, 7, 8]]
```

Here's the kind of error you get when you try to spread arguments to a
command with no rest parameter:

![image](https://github.com/nushell/nushell/assets/45539777/93faceae-00eb-4e59-ac3f-17f98436e6e4)

And this is the warning you get when you pass a list to an external now
(without `...`):


![image](https://github.com/nushell/nushell/assets/45539777/d368f590-201e-49fb-8b20-68476ced415e)


# Tests + Formatting
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Added tests to cover the following cases:
- Spreading arguments to a command that doesn't have a rest parameter
(unexpected spread argument error)
- Spreading arguments to a command that doesn't have a rest parameter
*but* there's also a missing positional argument (missing positional
error)
- Spreading arguments to a command that doesn't have a rest parameter
but does allow unknown arguments, such as `exec` (allowed)
- Spreading a list literal containing arguments of the wrong type (parse
error)
- Spreading a non-list value, both to internal and external commands
- Having named arguments in the middle of rest arguments
- `explain`ing a command call that spreads its arguments

# After Submitting
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# Examples

Suppose you have multiple tables:
```nushell
let people = [[id name age]; [0 alice 100] [1 bob 200] [2 eve 300]]
let evil_twins = [[id name age]; [0 ecila 100] [-1 bob 200] [-2 eve 300]]
```

Maybe you often find yourself needing to merge multiple tables and want
a utility to do that. You could write a function like this:
```nushell
def merge_all [ ...tables ] { $tables | reduce { |it, acc| $acc | merge $it } }
```

Then you can use it like this:
```nushell
> merge_all ...([$people $evil_twins] | each { |$it| $it | select name age })
╭───┬───────┬─────╮
│ # │ name  │ age │
├───┼───────┼─────┤
│ 0 │ ecila │ 100 │
│ 1 │ bob   │ 200 │
│ 2 │ eve   │ 300 │
╰───┴───────┴─────╯
```

Except they had duplicate columns, so now you first want to suffix every
column with a number to tell you which table the column came from. You
can make a command for that:
```nushell
def select_and_merge [ --cols: list<string>, ...tables ] {
  let renamed_tables = $tables
    | enumerate
    | each { |it|
      $it.item | select $cols | rename ...($cols | each { |col| $col + ($it.index | into string) })
    };
  merge_all ...$renamed_tables
}
```
And call it like this:
```nushell
> select_and_merge --cols [name age] $people $evil_twins
╭───┬───────┬──────┬───────┬──────╮
│ # │ name0 │ age0 │ name1 │ age1 │
├───┼───────┼──────┼───────┼──────┤
│ 0 │ alice │  100 │ ecila │  100 │
│ 1 │ bob   │  200 │ bob   │  200 │
│ 2 │ eve   │  300 │ eve   │  300 │
╰───┴───────┴──────┴───────┴──────╯
```

---

Suppose someone's made a command to search for APT packages:

```nushell
# The main command
def search-pkgs [
    --install                   # Whether to install any packages it finds
    log_level: int              # Pretend it's a good idea to make this a required positional parameter
    exclude?: list<string>      # Packages to exclude
    repositories?: list<string> # Which repositories to look in (searches in all if not given)
    ...pkgs                     # Package names to search for
] {
  { install: $install, log_level: $log_level, exclude: ($exclude | to nuon), repositories: ($repositories | to nuon), pkgs: ($pkgs | to nuon) }
}
```

It has a lot of parameters to configure it, so you might make your own
helper commands to wrap around it for specific cases. Here's one
example:
```nushell
# Only look for packages locally
def search-pkgs-local [
    --install              # Whether to install any packages it finds
    log_level: int
    exclude?: list<string> # Packages to exclude
    ...pkgs                # Package names to search for
] {
  # All required and optional positional parameters are given
  search-pkgs --install=$install $log_level [] ["<local URI or something>"] ...$pkgs
}
```
And you can run it like this:
```nushell
> search-pkgs-local --install=false 5 ...["python2.7" "vim"]
╭──────────────┬──────────────────────────────╮
│ install      │ false                        │
│ log_level    │ 5                            │
│ exclude      │ []                           │
│ repositories │ ["<local URI or something>"] │
│ pkgs         │ ["python2.7", vim]           │
╰──────────────┴──────────────────────────────╯
```

One thing I realized when writing this was that if we decide to not
allow passing optional arguments using the spread operator, then you can
(mis?)use the spread operator to skip optional parameters. Here, I
didn't want to give `exclude` explicitly, so I used a spread operator to
pass the packages to install. Without it, I would've needed to do
`search-pkgs-local --install=false 5 [] "python2.7" "vim"` (explicitly
pass `[]` (or `null`, in the general case) to `exclude`). There are
probably more idiomatic ways to do this, but I just thought it was
something interesting.

If you're a virologist of the [xkcd](https://xkcd.com/350/) kind,
another helper command you might make is this:
```nushell
# Install any packages it finds
def live-dangerously [ ...pkgs ] {
  # One optional argument was given (exclude), while another was not (repositories)
  search-pkgs 0 [] ...$pkgs --install # Flags can go after spread arguments
}
```

Running it:
```nushell
> live-dangerously "git" "*vi*" # *vi* because I don't feel like typing out vim and neovim
╭──────────────┬─────────────╮
│ install      │ true        │
│ log_level    │ 0           │
│ exclude      │ []          │
│ repositories │ null        │
│ pkgs         │ [git, *vi*] │
╰──────────────┴─────────────╯
```

Here's an example that uses the spread operator more than once within
the same command call:
```nushell
let extras = [ chrome firefox python java git ]

def search-pkgs-curated [ ...pkgs ] {
  (search-pkgs
      1
      [emacs]
      ["example.com", "foo.com"]
      vim # A must for everyone!
      ...($pkgs | filter { |p| not ($p | str contains "*") }) # Remove packages with globs
      python # Good tool to have
      ...$extras
      --install=false
      python3) # I forget, did I already put Python in extras?
}
```

Running it:
```nushell
> search-pkgs-curated "git" "*vi*"
╭──────────────┬───────────────────────────────────────────────────────────────────╮
│ install      │ false                                                             │
│ log_level    │ 1                                                                 │
│ exclude      │ [emacs]                                                           │
│ repositories │ [example.com, foo.com]                                            │
│ pkgs         │ [vim, git, python, chrome, firefox, python, java, git, "python3"] │
╰──────────────┴───────────────────────────────────────────────────────────────────╯
```
2023-12-28 15:43:20 +08:00
Yash Thakur
9522052063
More specific errors for missing values in records (#11423)
# Description
Currently, when writing a record, if you don't give the value for a
field, the syntax error highlights the entire record instead of
pinpointing the issue. Here's some examples:

```nushell
> { a: 2, 3 } # Missing colon (and value)
Error: nu::parser::parse_mismatch

  × Parse mismatch during operation.
   ╭─[entry #2:1:1]
 1 │  { a: 2, 3 }
   ·  ─────┬─────
   ·       ╰── expected record
   ╰────

> { a: 2, 3: } # Missing value
Error: nu::parser::parse_mismatch

  × Parse mismatch during operation.
   ╭─[entry #3:1:1]
 1 │  { a: 2, 3: }
   ·  ──────┬─────
   ·        ╰── expected record
   ╰────

> { a: 2, 3 4 } # Missing colon
Error: nu::parser::parse_mismatch

  × Parse mismatch during operation.
   ╭─[entry #4:1:1]
 1 │  { a: 2, 3 4 }
   ·  ──────┬──────
   ·        ╰── expected record
   ╰────
```

In all of them, the entire record is highlighted red because an
`Expr::Garbage` is returned covering that whole span:


![image](https://github.com/nushell/nushell/assets/45539777/36660b50-23be-4353-b180-3f84eff3c220)

This PR is for highlighting only the part inside the record that could
not be parsed. If the record literal is big, an error message pointing
to the start of where the parser thinks things went wrong should help
people fix their code.

# User-Facing Changes
Below are screenshots of the new errors:

If there's a stray record key right before the record ends, it
highlights only that key and tells the user it expected a colon after
it:


![image](https://github.com/nushell/nushell/assets/45539777/94503256-8ea2-47dd-b69a-4b520c66f7b6)

If the record ends before the value for the last field was given, it
highlights the key and colon of that field and tells the user it
expected a value after the colon:


![image](https://github.com/nushell/nushell/assets/45539777/2f3837ec-3b35-4b81-8c57-706f8056ac04)

If there are two consecutive expressions without a colon between them,
it highlights everything from the second expression to the end of the
record and tells the user it expected a colon. I was tempted to add a
help message suggesting adding a colon in between, but that may not
always be the right thing to do.


![image](https://github.com/nushell/nushell/assets/45539777/1abaaaa8-1896-4909-bbb7-9a38cece5250)

# Tests + Formatting

# After Submitting
2023-12-27 10:15:12 +01:00
Ian Manske
ba880277bf
Remove unnecessary replace_in_variable (#11424)
# Description
`Expression::replace_in_variable` is only called in one place, and it is
called with `new_var_id` = `IN_VARIABLE_ID`. So, it ends up doing
nothing. E.g., adding `debug_assert_eq!(new_var_id, IN_VARIABLE_ID)` in
`replace_in_variable` does not trigger any panic.

# User-Facing Changes
Breaking change for `nu_protocol`.
2023-12-26 18:46:49 +01:00
WindSoilder
5d98a727ca
Deprecate --flag: bool in custom command (#11365)
# Description
While #11057 is merged, it's hard to tell the difference between
`--flag: bool` and `--flag`, and it makes user hard to read custom
commands' signature, and hard to use them correctly.

After discussion, I think we can deprecate `--flag: bool` usage, and
encourage using `--flag` instead.

# User-Facing Changes
The following code will raise warning message, but don't stop from
running.
```nushell
❯ def florb [--dry-run: bool, --another-flag] { "aaa" };  florb
Error:   × Deprecated: --flag: bool
   ╭─[entry #7:1:1]
 1 │ def florb [--dry-run: bool, --another-flag] { "aaa" };  florb
   ·                       ──┬─
   ·                         ╰── `--flag: bool` is deprecated. Please use `--flag` instead, more info: https://www.nushell.sh/book/custom_commands.html
   ╰────

aaa
```

cc @kubouch 

# Tests + Formatting
Done

# After Submitting
- [ ] Add more information under
https://www.nushell.sh/book/custom_commands.html to indicate `--dry-run:
bool` is not allowed,
- [ ] remove `: bool` from custom commands between 0.89 and 0.90

---------

Co-authored-by: Antoine Stevan <44101798+amtoine@users.noreply.github.com>
2023-12-21 10:07:08 +01:00
Ian Manske
ff6a67d293
Remove Expr::MatchPattern (#11367)
# Description
Following from #11356, it looks like `Expr::MatchPattern` is no longer
used in any way. This PR removes `Expr::MatchPattern` alongside
`Type::MatchPattern` and `SyntaxShape::MatchPattern`.

# User-Facing Changes
Breaking API change for `nu_protocol`.
2023-12-20 18:52:28 +01:00
dependabot[bot]
03ae01f11e
Bump itertools from 0.11.0 to 0.12.0 (#11360)
Bumps [itertools](https://github.com/rust-itertools/itertools) from
0.11.0 to 0.12.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/rust-itertools/itertools/blob/master/CHANGELOG.md">itertools's
changelog</a>.</em></p>
<blockquote>
<h2>0.12.0</h2>
<h3>Breaking</h3>
<ul>
<li>Made <code>take_while_inclusive</code> consume iterator by value (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/709">#709</a>)</li>
<li>Added <code>Clone</code> bound to <code>Unique</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/777">#777</a>)</li>
</ul>
<h3>Added</h3>
<ul>
<li>Added <code>Itertools::try_len</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/723">#723</a>)</li>
<li>Added free function <code>sort_unstable</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/796">#796</a>)</li>
<li>Added <code>GroupMap::fold_with</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/778">#778</a>,
<a
href="https://redirect.github.com/rust-itertools/itertools/issues/785">#785</a>)</li>
<li>Added <code>PeekNth::{peek_mut, peek_nth_mut}</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/716">#716</a>)</li>
<li>Added <code>PeekNth::{next_if, next_if_eq}</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/734">#734</a>)</li>
<li>Added conversion into <code>(Option&lt;A&gt;,Option&lt;B&gt;)</code>
to <code>EitherOrBoth</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/713">#713</a>)</li>
<li>Added conversion from <code>Either&lt;A, B&gt;</code> to
<code>EitherOrBoth&lt;A, B&gt;</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/715">#715</a>)</li>
<li>Implemented <code>ExactSizeIterator</code> for <code>Tuples</code>
(<a
href="https://redirect.github.com/rust-itertools/itertools/issues/761">#761</a>)</li>
<li>Implemented <code>ExactSizeIterator</code> for
<code>(Circular)TupleWindows</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/752">#752</a>)</li>
<li>Made <code>EitherOrBoth&lt;T&gt;</code> a shorthand for
<code>EitherOrBoth&lt;T, T&gt;</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/719">#719</a>)</li>
</ul>
<h3>Changed</h3>
<ul>
<li>Added missing <code>#[must_use]</code> annotations on iterator
adaptors (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/794">#794</a>)</li>
<li>Made <code>Combinations</code> lazy (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/795">#795</a>)</li>
<li>Made <code>Intersperse(With)</code> lazy (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/797">#797</a>)</li>
<li>Made <code>Permutations</code> lazy (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/793">#793</a>)</li>
<li>Made <code>Product</code> lazy (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/800">#800</a>)</li>
<li>Made <code>TupleWindows</code> lazy (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/602">#602</a>)</li>
<li>Specialized <code>Combinations::{count, size_hint}</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/729">#729</a>)</li>
<li>Specialized <code>CombinationsWithReplacement::{count,
size_hint}</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/737">#737</a>)</li>
<li>Specialized <code>Powerset::fold</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/765">#765</a>)</li>
<li>Specialized <code>Powerset::count</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/735">#735</a>)</li>
<li>Specialized <code>TupleCombinations::{count, size_hint}</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/763">#763</a>)</li>
<li>Specialized <code>TupleCombinations::fold</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/775">#775</a>)</li>
<li>Specialized <code>WhileSome::fold</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/780">#780</a>)</li>
<li>Specialized <code>WithPosition::fold</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/772">#772</a>)</li>
<li>Specialized <code>ZipLongest::fold</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/774">#774</a>)</li>
<li>Changed <code>{min, max}_set*</code> operations require
<code>alloc</code> feature, instead of <code>std</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/760">#760</a>)</li>
<li>Improved documentation of <code>tree_fold1</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/787">#787</a>)</li>
<li>Improved documentation of <code>permutations</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/724">#724</a>)</li>
<li>Fixed typo in documentation of <code>multiunzip</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/770">#770</a>)</li>
</ul>
<h3>Notable Internal Changes</h3>
<ul>
<li>Improved specialization tests (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/799">#799</a>,
<a
href="https://redirect.github.com/rust-itertools/itertools/issues/786">#786</a>,
<a
href="https://redirect.github.com/rust-itertools/itertools/issues/782">#782</a>)</li>
<li>Simplified implementation of <code>Permutations</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/739">#739</a>,
<a
href="https://redirect.github.com/rust-itertools/itertools/issues/748">#748</a>,
<a
href="https://redirect.github.com/rust-itertools/itertools/issues/790">#790</a>)</li>
<li>Combined
<code>Merge</code>/<code>MergeBy</code>/<code>MergeJoinBy</code>
implementations (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/736">#736</a>)</li>
<li>Simplified <code>Permutations::size_hint</code> (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/739">#739</a>)</li>
<li>Fix wrapping arithmetic in benchmarks (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/770">#770</a>)</li>
<li>Enforced <code>rustfmt</code> in CI (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/751">#751</a>)</li>
<li>Disallowed compile warnings in CI (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/720">#720</a>)</li>
<li>Used <code>cargo hack</code> to check MSRV (<a
href="https://redirect.github.com/rust-itertools/itertools/issues/754">#754</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="98ecabb47d"><code>98ecabb</code></a>
chore: Release itertools version 0.12.0</li>
<li><a
href="22fc427ac5"><code>22fc427</code></a>
prepare v0.12.0 release</li>
<li><a
href="6d291786a9"><code>6d29178</code></a>
Document the field <code>a_cur</code> of <code>Product</code></li>
<li><a
href="bf2b0129d1"><code>bf2b012</code></a>
Better <code>Product::size_hint</code></li>
<li><a
href="8d07f6b856"><code>8d07f6b</code></a>
Make <code>Product</code> lazy</li>
<li><a
href="d7e6bab9fd"><code>d7e6bab</code></a>
Document the field <code>peek</code> of
<code>IntersperseWith</code></li>
<li><a
href="9b01a11891"><code>9b01a11</code></a>
Make <code>IntersperseWith</code> lazy</li>
<li><a
href="4f22173b93"><code>4f22173</code></a>
Refactor <code>IntersperseWith::next</code></li>
<li><a
href="b76172b412"><code>b76172b</code></a>
chore: adjust docs to reflect discussion in the PR</li>
<li><a
href="955927f6c4"><code>955927f</code></a>
chore: fixup docs of tree_fold1</li>
<li>Additional commits viewable in <a
href="https://github.com/rust-itertools/itertools/compare/v0.11.0...v0.12.0">compare
view</a></li>
</ul>
</details>
<br />


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2023-12-20 22:58:07 +08:00
WindSoilder
697f3c03f1
enable flag value type checking (#11311)
# Description
Fixes: #11310

# User-Facing Changes
After the change, the following code will go to error:
```nushell
> def a [--x: int = 3] { "aa" }
> let y = "aa"
> a --x=$y
Error: nu::parser::type_mismatch

  × Type mismatch.
   ╭─[entry #32:2:1]
 2 │ let y = "aa"
 3 │ a --x=$y
   ·       ─┬
   ·        ╰── expected int, found string
   ╰────
```
2023-12-20 11:07:19 +01:00
Antoine Stevan
156232fe08
disable directory submodule auto export (#11157)
should
- close https://github.com/nushell/nushell/issues/11133

# Description
to allow more freedom when writing complex modules, we are disabling the
auto-export of director modules.

the change was as simple as removing the crawling of files and modules
next to any `mod.nu` and update the standard library.

# User-Facing Changes
users will have to explicitely use `export module <mod>` to define
submodules and `export use <mod> <cmd>` to re-export definitions, e.g.
```nushell
# my-module/mod.nu
export module foo.nu     # export a submodule
export use bar.nu bar-1  # re-export an internal command

export def top [] {
    print "`top` from `mod.nu`"
}
```
```nushell
# my-module/foo.nu
export def "foo-1" [] {
    print "`foo-1` from `lib/foo.nu`"
}

export def "foo-2" [] {
    print "`foo-2` from `lib/foo.nu`"
}
```
```nushell
# my-module/bar.nu
export def "bar-1" [] {
    print "`bar-1` from `lib/bar.nu`"
}
```

# Tests + Formatting
i had to add `export module` calls in the `tests/modules/samples/spam`
directory module and allow the `not_allowed` module to not give an
error, it is just empty, which is fine.

# After Submitting
- mention in the release note
- update the following repos
```
#┬─────name─────┬version┬─type─┬─────────repo─────────
0│nu-git-manager│0.4.0  │module│amtoine/nu-git-manager
1│nu-scripts    │0.1.0  │module│amtoine/scripts       
2│nu-zellij     │0.1.0  │module│amtoine/zellij-layouts
3│nu-scripts    │0.1.0  │module│nushell/nu_scripts    
4│nupm          │0.1.0  │module│nushell/nupm          
─┴──────────────┴───────┴──────┴──────────────────────
```
2023-12-15 12:37:55 +01:00
Stefan Holderbach
c2b684464f
Bump version to 0.88.2 (#11333) 2023-12-14 13:55:48 -06:00